In September 1916, the first tank secretly made its way onto the fields of the Battle of Somme. The British had developed the technology and were ready to reveal it on the trenched and barbed wire battlefields of World War I. At the time, they did not prove to have the best track record, breaking down and unreliable, but the psychological effect the machines had on the German soldiers they were fighting was well worth the trouble.
"You cannot move without being seen," Army Secretary Daniel Driscoll said of the battlefield in Ukraine during an episode of the War on the Rocks podcast that aired on Tuesday.